My Cannon is a smaller safe (have a second safe for rifles) and like others I prefer to store barrel down. Took out the factory racks, made one from a piece of plywood, glued door weatherstripping around the U shaped slots, then covered that with painters tape. Also added two pieces of plywood to the floor (covered in a gun cleaning mat) to keep from hitting the barrels on the door frame. Allows me to keep 12 guns that can be moved without hitting each other.